Credits

Image: Dartmoor, Emma Brice

Information sourced from:

US News and World Report (2014) The 2015 U.S and World Populations [online], Available from: http://www.usnews.com/opinion/blogs/robert-schlesinger/2014/12/31/us-population-2015-320-million-and-world-population-72-billion [accessed 28/05/2015].

Office for National Statistics (2014), Total Population (UK) Mid-2013 Estimate [online], Available from: http://ons.gov.uk/ons/taxonomy/index.html?nscl=Population [accessed 15/06/2015].